<template>
	<view>
		<slot v-if="!nodes.length" />
		<!--#ifdef APP-PLUS-NVUE-->
		<web-view id="_top" ref="web" :style="'margin-top:-2px;height:' + height + 'px'" @onPostMessage="_message" />
		<!--#endif-->
		<!--#ifndef APP-PLUS-NVUE-->
		<view id="_top" :style="showAm + (selectable ? ';user-select:text;-webkit-user-select:text' : '')">
			<!--#ifdef H5 || MP-360-->
			<div :id="'rtf' + uid"></div>
			<!--#endif-->
			<!--#ifndef H5 || MP-360-->
			<trees :nodes="nodes" :lazyLoad="lazyLoad" :loading="loadingImg" />
			<!--#endif-->
		</view>
		<!--#endif-->
	</view>
</template>

<script>
// #ifndef H5 || APP-PLUS-NVUE || MP-360
import trees from './libs/trees';
var cache = {},
	// #ifdef MP-WEIXIN || MP-TOUTIAO
	fs = uni.getFileSystemManager ? uni.getFileSystemManager() : null,
	// #endif
	Parser = require('./libs/MpHtmlParser.js');
var dom;
// 计算 cache 的 key
function hash(str) {
	for (var i = str.length, val = 5381; i--; ) val += (val << 5) + str.charCodeAt(i);
	return val;
}
// #endif
// #ifdef H5 || APP-PLUS-NVUE || MP-360
var { windowWidth, platform } = uni.getSystemInfoSync(),
	cfg = require('./libs/config.js');
// #endif
// #ifdef APP-PLUS-NVUE
var weexDom = weex.requireModule('dom');
// #endif
/**
 * Parser 富文本组件
 * @tutorial https://github.com/jin-yufeng/Parser
 * @property {String} html 富文本数据
 * @property {Boolean} autopause 是否在播放一个视频时自动暂停其他视频
 * @property {Boolean} autoscroll 是否自动给所有表格添加一个滚动层
 * @property {Boolean} autosetTitle 是否自动将 title 标签中的内容设置到页面标题
 * @property {Number} compress 压缩等级
 * @property {String} domain 图片、视频等链接的主域名
 * @property {Boolean} lazyLoad 是否开启图片懒加载
 * @property {String} loadingImg 图片加载完成前的占位图
 * @property {Boolean} selectable 是否开启长按复制
 * @property {Object} tagStyle 标签的默认样式
 * @property {Boolean} showWithAnimation 是否使用渐显动画
 * @property {Boolean} useAnchor 是否使用锚点
 * @property {Boolean} useCache 是否缓存解析结果
 * @event {Function} parse 解析完成事件
 * @event {Function} load dom 加载完成事件
 * @event {Function} ready 所有图片加载完毕事件
 * @event {Function} error 错误事件
 * @event {Function} imgtap 图片点击事件
 * @event {Function} linkpress 链接点击事件
 * @author JinYufeng
 * @version 20200828
 * @listens MIT
 */
export default {
	name: 'parser',
	data() {
		return {
			// #ifdef H5 || MP-360
			uid: this._uid,
			// #endif
			// #ifdef APP-PLUS-NVUE
			height: 1,
			// #endif
			// #ifndef APP-PLUS-NVUE
			showAm: '',
			// #endif
			nodes: []
		};
	},
	// #ifndef H5 || APP-PLUS-NVUE || MP-360
	components: {
		trees
	},
	// #endif
	props: {
		html: String,
		autopause: {
			type: Boolean,
			default: true
		},
		autoscroll: Boolean,
		autosetTitle: {
			type: Boolean,
			default: true
		},
		// #ifndef H5 || APP-PLUS-NVUE || MP-360
		compress: Number,
		loadingImg: String,
		useCache: Boolean,
		// #endif
		domain: String,
		lazyLoad: Boolean,
		selectable: Boolean,
		tagStyle: Object,
		showWithAnimation: Boolean,
		useAnchor: Boolean
	},
	watch: {
		html(html) {
			this.setContent(html);
		}
	},
	created() {
		// 图片数组
		this.imgList = [];
		this.imgList.each = function (f) {
			for (var i = 0, len = this.length; i < len; i++) this.setItem(i, f(this[i], i, this));
		};
		this.imgList.setItem = function (i, src) {
			if (i == void 0 || !src) return;
			// #ifndef MP-ALIPAY || APP-PLUS
			// 去重
			if (src.indexOf('http') == 0 && this.includes(src)) {
				var newSrc = src.split('://')[0];
				for (var j = newSrc.length, c; (c = src[j]); j++) {
					if (c == '/' && src[j - 1] != '/' && src[j + 1] != '/') break;
					newSrc += Math.random() > 0.5 ? c.toUpperCase() : c;
				}
				newSrc += src.substr(j);
				return (this[i] = newSrc);
			}
			// #endif
			this[i] = src;
			// 暂存 data src
			if (src.includes('data:image')) {
				var filePath,
					info = src.match(/data:image\/(\S+?);(\S+?),(.+)/);
				if (!info) return;
				// #ifdef MP-WEIXIN || MP-TOUTIAO
				filePath = `${wx.env.USER_DATA_PATH}/${Date.now()}.${info[1]}`;
				fs &&
					fs.writeFile({
						filePath,
						data: info[3],
						encoding: info[2],
						success: () => (this[i] = filePath)
					});
				// #endif
				// #ifdef APP-PLUS
				filePath = `_doc/parser_tmp/${Date.now()}.${info[1]}`;
				var bitmap = new plus.nativeObj.Bitmap();
				bitmap.loadBase64Data(src, () => {
					bitmap.save(filePath, {}, () => {
						bitmap.clear();
						this[i] = filePath;
					});
				});
				// #endif
			}
		};
	},
	mounted() {
		// #ifdef H5 || MP-360
		this.document = document.getElementById('rtf' + this._uid);
		// #endif
		// #ifndef H5 || APP-PLUS-NVUE || MP-360
		if (dom) this.document = new dom(this);
		// #endif
		// #ifdef APP-PLUS-NVUE
		this.document = this.$refs.web;
		setTimeout(() => {
			// #endif
			if (this.html) this.setContent(this.html);
			// #ifdef APP-PLUS-NVUE
		}, 30);
		// #endif
	},
	beforeDestroy() {
		// #ifdef H5 || MP-360
		if (this._observer) this._observer.disconnect();
		// #endif
		this.imgList.each((src) => {
			// #ifdef APP-PLUS
			if (src && src.includes('_doc')) {
				plus.io.resolveLocalFileSystemURL(src, (entry) => {
					entry.remove();
				});
			}
			// #endif
			// #ifdef MP-WEIXIN || MP-TOUTIAO
			if (src && src.includes(uni.env.USER_DATA_PATH))
				fs &&
					fs.unlink({
						filePath: src
					});
			// #endif
		});
		clearInterval(this._timer);
	},
	methods: {
		// 设置富文本内容
		setContent(html, append) {
			// #ifdef APP-PLUS-NVUE
			if (!html) return (this.height = 1);
			if (append) this.$refs.web.evalJs("var b=document.createElement('div');b.innerHTML='" + html.replace(/'/g, "\\'") + "';document.getElementById('parser').appendChild(b)");
			else {
				html =
					'<meta charset="utf-8" /><meta name="viewport" content="width=device-width,initial-scale=1,minimum-scale=1,maximum-scale=1,user-scalable=no"><style>html,body{width:100%;height:100%;overflow:hidden}body{margin:0}</style><base href="' +
					this.domain +
					'"><div id="parser"' +
					(this.selectable ? '>' : ' style="user-select:none">') +
					this._handleHtml(html).replace(/\n/g, '\\n') +
					'</div><script>"use strict";function e(e){if(window.__dcloud_weex_postMessage||window.__dcloud_weex_){var t={data:[e]};window.__dcloud_weex_postMessage?window.__dcloud_weex_postMessage(t):window.__dcloud_weex_.postMessage(JSON.stringify(t))}}document.body.onclick=function(){e({action:"click"})},' +
					(this.showWithAnimation ? 'document.body.style.animation="_show .5s",' : '') +
					'setTimeout(function(){e({action:"load",text:document.body.innerText,height:document.getElementById("parser").scrollHeight})},50);\x3c/script>';
				if (platform == 'android') html = html.replace(/%/g, '%25');
				this.$refs.web.evalJs("document.write('" + html.replace(/'/g, "\\'") + "');document.close()");
			}
			this.$refs.web.evalJs(
				'var t=document.getElementsByTagName("title");t.length&&e({action:"getTitle",title:t[0].innerText});for(var o,n=document.getElementsByTagName("style"),r=1;o=n[r++];)o.innerHTML=o.innerHTML.replace(/body/g,"#parser");for(var a,c=document.getElementsByTagName("img"),s=[],i=0==c.length,d=0,l=0,g=0;a=c[l];l++)parseInt(a.style.width||a.getAttribute("width"))>' +
					windowWidth +
					'&&(a.style.height="auto"),a.onload=function(){++d==c.length&&(i=!0)},a.onerror=function(){++d==c.length&&(i=!0),' +
					(cfg.errorImg ? 'this.src="' + cfg.errorImg + '",' : '') +
					'e({action:"error",source:"img",target:this})},a.hasAttribute("ignore")||"A"==a.parentElement.nodeName||(a.i=g++,s.push(a.getAttribute("original-src")||a.src||a.getAttribute("data-src")),a.onclick=function(){e({action:"preview",img:{i:this.i,src:this.src}})});e({action:"getImgList",imgList:s});for(var u,m=document.getElementsByTagName("a"),f=0;u=m[f];f++)u.onclick=function(){var t,o=this.getAttribute("href");if("#"==o[0]){var n=document.getElementById(o.substr(1));n&&(t=n.offsetTop)}return e({action:"linkpress",href:o,offset:t}),!1};for(var h,y=document.getElementsByTagName("video"),v=0;h=y[v];v++)h.style.maxWidth="100%",h.onerror=function(){e({action:"error",source:"video",target:this})}' +
					(this.autopause ? ',h.onplay=function(){for(var e,t=0;e=y[t];t++)e!=this&&e.pause()}' : '') +
					';for(var _,p=document.getElementsByTagName("audio"),w=0;_=p[w];w++)_.onerror=function(){e({action:"error",source:"audio",target:this})};' +
					(this.autoscroll ? 'for(var T,E=document.getElementsByTagName("table"),B=0;T=E[B];B++){var N=document.createElement("div");N.style.overflow="scroll",T.parentNode.replaceChild(N,T),N.appendChild(T)}' : '') +
					'var x=document.getElementById("parser");clearInterval(window.timer),window.timer=setInterval(function(){i&&clearInterval(window.timer),e({action:"ready",ready:i,height:x.scrollHeight})},350)'
			);
			this.nodes = [1];
			// #endif
			// #ifdef H5 || MP-360
			if (!html) {
				if (this.rtf && !append) this.rtf.parentNode.removeChild(this.rtf);
				return;
			}
			var div = document.createElement('div');
			if (!append) {
				if (this.rtf) this.rtf.parentNode.removeChild(this.rtf);
				this.rtf = div;
			} else {
				if (!this.rtf) this.rtf = div;
				else this.rtf.appendChild(div);
			}
			div.innerHTML = this._handleHtml(html, append);
			for (var styles = this.rtf.getElementsByTagName('style'), i = 0, style; (style = styles[i++]); ) {
				style.innerHTML = style.innerHTML.replace(/body/g, '#rtf' + this._uid);
				style.setAttribute('scoped', 'true');
			}
			// 懒加载
			if (!this._observer && this.lazyLoad && IntersectionObserver) {
				this._observer = new IntersectionObserver(
					(changes) => {
						for (let item, i = 0; (item = changes[i++]); ) {
							if (item.isIntersecting) {
								item.target.src = item.target.getAttribute('data-src');
								item.target.removeAttribute('data-src');
								this._observer.unobserve(item.target);
							}
						}
					},
					{
						rootMargin: '500px 0px 500px 0px'
					}
				);
			}
			var _ts = this;
			// 获取标题
			var title = this.rtf.getElementsByTagName('title');
			if (title.length && this.autosetTitle)
				uni.setNavigationBarTitle({
					title: title[0].innerText
				});
			// 图片处理
			this.imgList.length = 0;
			var imgs = this.rtf.getElementsByTagName('img');
			for (let i = 0, j = 0, img; (img = imgs[i]); i++) {
				if (parseInt(img.style.width || img.getAttribute('width')) > windowWidth) img.style.height = 'auto';
				var src = img.getAttribute('src');
				if (this.domain && src) {
					if (src[0] == '/') {
						if (src[1] == '/') img.src = (this.domain.includes('://') ? this.domain.split('://')[0] : '') + ':' + src;
						else img.src = this.domain + src;
					} else if (!src.includes('://')) img.src = this.domain + '/' + src;
				}
				if (!img.hasAttribute('ignore') && img.parentElement.nodeName != 'A') {
					img.i = j++;
					_ts.imgList.push(img.getAttribute('original-src') || img.src || img.getAttribute('data-src'));
					img.onclick = function () {
						var preview = true;
						this.ignore = () => (preview = false);
						_ts.$emit('imgtap', this);
						if (preview) {
							uni.previewImage({
								current: this.i,
								urls: _ts.imgList
							});
						}
					};
				}
				img.onerror = function () {
					if (cfg.errorImg) _ts.imgList[this.i] = this.src = cfg.errorImg;
					_ts.$emit('error', {
						source: 'img',
						target: this
					});
				};
				if (_ts.lazyLoad && this._observer && img.src && img.i != 0) {
					img.setAttribute('data-src', img.src);
					img.removeAttribute('src');
					this._observer.observe(img);
				}
			}
			// 链接处理
			var links = this.rtf.getElementsByTagName('a');
			for (var link of links) {
				link.onclick = function () {
					var jump = true,
						href = this.getAttribute('href');
					_ts.$emit('linkpress', {
						href,
						ignore: () => (jump = false)
					});
					if (jump && href) {
						if (href[0] == '#') {
							if (_ts.useAnchor) {
								_ts.navigateTo({
									id: href.substr(1)
								});
							}
						} else if (href.indexOf('http') == 0 || href.indexOf('//') == 0) return true;
						else
							uni.navigateTo({
								url: href
							});
					}
					return false;
				};
			}
			// 视频处理
			var videos = this.rtf.getElementsByTagName('video');
			_ts.videoContexts = videos;
			for (let video, i = 0; (video = videos[i++]); ) {
				video.style.maxWidth = '100%';
				video.onerror = function () {
					_ts.$emit('error', {
						source: 'video',
						target: this
					});
				};
				video.onplay = function () {
					if (_ts.autopause) for (let item, i = 0; (item = _ts.videoContexts[i++]); ) if (item != this) item.pause();
				};
			}
			// 音频处理
			var audios = this.rtf.getElementsByTagName('audio');
			for (var audio of audios)
				audio.onerror = function () {
					_ts.$emit('error', {
						source: 'audio',
						target: this
					});
				};
			// 表格处理
			if (this.autoscroll) {
				var tables = this.rtf.getElementsByTagName('table');
				for (var table of tables) {
					let div = document.createElement('div');
					div.style.overflow = 'scroll';
					table.parentNode.replaceChild(div, table);
					div.appendChild(table);
				}
			}
			if (!append) this.document.appendChild(this.rtf);
			this.$nextTick(() => {
				this.nodes = [1];
				this.$emit('load');
			});
			setTimeout(() => (this.showAm = ''), 500);
			// #endif
			// #ifndef APP-PLUS-NVUE
			// #ifndef H5 || MP-360
			var nodes;
			if (!html) return (this.nodes = []);
			var parser = new Parser(html, this);
			// 缓存读取
			if (this.useCache) {
				var hashVal = hash(html);
				if (cache[hashVal]) nodes = cache[hashVal];
				else {
					nodes = parser.parse();
					cache[hashVal] = nodes;
				}
			} else nodes = parser.parse();
			this.$emit('parse', nodes);
			if (append) this.nodes = this.nodes.concat(nodes);
			else this.nodes = nodes;
			if (nodes.length && nodes.title && this.autosetTitle)
				uni.setNavigationBarTitle({
					title: nodes.title
				});
			if (this.imgList) this.imgList.length = 0;
			this.videoContexts = [];
			this.$nextTick(() => {
				(function f(cs) {
					for (var i = cs.length; i--; ) {
						if (cs[i].top) {
							cs[i].controls = [];
							cs[i].init();
							f(cs[i].$children);
						}
					}
				})(this.$children);
				this.$emit('load');
			});
			// #endif
			var height;
			clearInterval(this._timer);
			this._timer = setInterval(() => {
				// #ifdef H5 || MP-360
				this.rect = this.rtf.getBoundingClientRect();
				// #endif
				// #ifndef H5 || MP-360
				uni
					.createSelectorQuery()
					.in(this)
					.select('#_top')
					.boundingClientRect()
					.exec((res) => {
						if (!res) return;
						this.rect = res[0];
						// #endif
						if (this.rect.height == height) {
							this.$emit('ready', this.rect);
							clearInterval(this._timer);
						}
						height = this.rect.height;
						// #ifndef H5 || MP-360
					});
				// #endif
			}, 350);
			if (this.showWithAnimation && !append) this.showAm = 'animation:_show .5s';
			// #endif
		},
		// 获取文本内容
		getText(ns = this.nodes) {
			var txt = '';
			// #ifdef APP-PLUS-NVUE
			txt = this._text;
			// #endif
			// #ifdef H5 || MP-360
			txt = this.rtf.innerText;
			// #endif
			// #ifndef H5 || APP-PLUS-NVUE || MP-360
			for (var i = 0, n; (n = ns[i++]); ) {
				if (n.type == 'text')
					txt += n.text
						.replace(/&nbsp;/g, '\u00A0')
						.replace(/&lt;/g, '<')
						.replace(/&gt;/g, '>')
						.replace(/&amp;/g, '&');
				else if (n.type == 'br') txt += '\n';
				else {
					// 块级标签前后加换行
					var block = n.name == 'p' || n.name == 'div' || n.name == 'tr' || n.name == 'li' || (n.name[0] == 'h' && n.name[1] > '0' && n.name[1] < '7');
					if (block && txt && txt[txt.length - 1] != '\n') txt += '\n';
					if (n.children) txt += this.getText(n.children);
					if (block && txt[txt.length - 1] != '\n') txt += '\n';
					else if (n.name == 'td' || n.name == 'th') txt += '\t';
				}
			}
			// #endif
			return txt;
		},
		// 锚点跳转
		in(obj) {
			if (obj.page && obj.selector && obj.scrollTop) this._in = obj;
		},
		navigateTo(obj) {
			if (!this.useAnchor) return obj.fail && obj.fail('Anchor is disabled');
			// #ifdef APP-PLUS-NVUE
			if (!obj.id) weexDom.scrollToElement(this.$refs.web);
			else this.$refs.web.evalJs('var pos=document.getElementById("' + obj.id + '");if(pos)post({action:"linkpress",href:"#",offset:pos.offsetTop+' + (obj.offset || 0) + '})');
			obj.success && obj.success();
			// #endif
			// #ifndef APP-PLUS-NVUE
			var d = ' ';
			// #ifdef MP-WEIXIN || MP-QQ || MP-TOUTIAO
			d = '>>>';
			// #endif
			var selector = uni
				.createSelectorQuery()
				.in(this._in ? this._in.page : this)
				.select((this._in ? this._in.selector : '#_top') + (obj.id ? `${d}#${obj.id},${this._in ? this._in.selector : '#_top'}${d}.${obj.id}` : ''))
				.boundingClientRect();
			if (this._in) selector.select(this._in.selector).scrollOffset().select(this._in.selector).boundingClientRect();
			else selector.selectViewport().scrollOffset();
			selector.exec((res) => {
				if (!res[0]) return obj.fail && obj.fail('Label not found');
				var scrollTop = res[1].scrollTop + res[0].top - (res[2] ? res[2].top : 0) + (obj.offset || 0);
				if (this._in) this._in.page[this._in.scrollTop] = scrollTop;
				else
					uni.pageScrollTo({
						scrollTop,
						duration: 300
					});
				obj.success && obj.success();
			});
			// #endif
		},
		// 获取视频对象
		getVideoContext(id) {
			// #ifndef APP-PLUS-NVUE
			if (!id) return this.videoContexts;
			else for (var i = this.videoContexts.length; i--; ) if (this.videoContexts[i].id == id) return this.videoContexts[i];
			// #endif
		},
		// #ifdef H5 || APP-PLUS-NVUE || MP-360
		_handleHtml(html, append) {
			if (!append) {
				// 处理 tag-style 和 userAgentStyles
				var style = '<style>@keyframes _show{0%{opacity:0}100%{opacity:1}}img{max-width:100%}';
				for (var item in cfg.userAgentStyles) style += `${item}{${cfg.userAgentStyles[item]}}`;
				for (item in this.tagStyle) style += `${item}{${this.tagStyle[item]}}`;
				style += '</style>';
				html = style + html;
			}
			// 处理 rpx
			if (html.includes('rpx')) html = html.replace(/[0-9.]+\s*rpx/g, ($) => (parseFloat($) * windowWidth) / 750 + 'px');
			return html;
		},
		// #endif
		// #ifdef APP-PLUS-NVUE
		_message(e) {
			// 接收 web-view 消息
			var d = e.detail.data[0];
			switch (d.action) {
				case 'load':
					this.$emit('load');
					this.height = d.height;
					this._text = d.text;
					break;
				case 'getTitle':
					if (this.autosetTitle)
						uni.setNavigationBarTitle({
							title: d.title
						});
					break;
				case 'getImgList':
					this.imgList.length = 0;
					for (var i = d.imgList.length; i--; ) this.imgList.setItem(i, d.imgList[i]);
					break;
				case 'preview':
					var preview = true;
					d.img.ignore = () => (preview = false);
					this.$emit('imgtap', d.img);
					if (preview)
						uni.previewImage({
							current: d.img.i,
							urls: this.imgList
						});
					break;
				case 'linkpress':
					var jump = true,
						href = d.href;
					this.$emit('linkpress', {
						href,
						ignore: () => (jump = false)
					});
					if (jump && href) {
						if (href[0] == '#') {
							if (this.useAnchor)
								weexDom.scrollToElement(this.$refs.web, {
									offset: d.offset
								});
						} else if (href.includes('://')) plus.runtime.openWeb(href);
						else
							uni.navigateTo({
								url: href
							});
					}
					break;
				case 'error':
					if (d.source == 'img' && cfg.errorImg) this.imgList.setItem(d.target.i, cfg.errorImg);
					this.$emit('error', {
						source: d.source,
						target: d.target
					});
					break;
				case 'ready':
					this.height = d.height;
					if (d.ready)
						uni
							.createSelectorQuery()
							.in(this)
							.select('#_top')
							.boundingClientRect()
							.exec((res) => {
								this.rect = res[0];
								this.$emit('ready', res[0]);
							});
					break;
				case 'click':
					this.$emit('click');
					this.$emit('tap');
			}
		}
		// #endif
	}
};
</script>

<style>
@keyframes _show {
	0% {
		opacity: 0;
	}

	100% {
		opacity: 1;
	}
}

/* #ifdef MP-WEIXIN */
:host {
	display: block;
	overflow: scroll;
	-webkit-overflow-scrolling: touch;
}

/* #endif */
</style>
